reduces chemicals and energy consumption in agricultural production as cotton fields are changed for food crops (cotton uses 11 % of world’s agro-chemicals but only 5% of the land)

Besides the energy reduction this will also mean less people affected by poisonous chemicals.

reduces energy used in all the steps of textile production, transport etc

reduces greenhouse gasses through all the issues mentioned above. By using less energy less carbon is emitted. When clothes are dumped they will rot and release the stored carbon. If reused the carbon is stored instead.

recycling of clothes uses very little energy and there are no harmful byproducts

gives people in the third world a chance to buy clothes at cheap prices